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rt-thread-official/bsp/nuvoton/libraries/n9h30/rtt_port/drv_can.c

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/**************************************************************************//**
*
* @copyright (C) 2020 Nuvoton Technology Corp. All rights reserved.
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2020-12-12 Wayne First version
*
******************************************************************************/
#include <rtconfig.h>
#if defined(BSP_USING_CAN)
#include <rtdevice.h>
#include <rthw.h>
#include "NuMicro.h"
#include <drv_sys.h>
/* Private Define ---------------------------------------------------------------*/
#define RX_MSG_ID_INDEX 16
#define IS_CAN_STDID(STDID) ((STDID) <= 0x7FFU)
#define IS_CAN_EXTID(EXTID) ((EXTID) <= 0x1FFFFFFFU)
#define IS_CAN_DLC(DLC) ((DLC) <= 8U)
/* Default config for serial_configure structure */
#define NU_CAN_CONFIG_DEFAULT \
{ \
CAN1MBaud, /* 1M bits/s */ \
RT_CANMSG_BOX_SZ, /* message box max size */ \
RT_CANSND_BOX_NUM, /* message box number */ \
RT_CAN_MODE_NORMAL, /* Normal mode */ \
0, /* privmode */ \
0, /* reserved */ \
100, /* Timeout Tick */ \
}
enum
{
CAN_START = -1,
#if defined(BSP_USING_CAN0)
CAN0_IDX,
#endif
#if defined(BSP_USING_CAN1)
CAN1_IDX,
#endif
CAN_CNT,
};
/* Private Typedef --------------------------------------------------------------*/
struct nu_can
{
struct rt_can_device dev;
char *name;
CAN_T *base;
IRQn_Type irqn;
E_SYS_IPRST rstidx;
E_SYS_IPCLK clkidx;
uint32_t int_flag;
};
typedef struct nu_can *nu_can_t;
/* Private functions ------------------------------------------------------------*/
static rt_err_t nu_can_configure(struct rt_can_device *can, struct can_configure *cfg);
static rt_err_t nu_can_control(struct rt_can_device *can, int cmd, void *arg);
static int nu_can_sendmsg(struct rt_can_device *can, const void *buf, rt_uint32_t boxno);
static int nu_can_recvmsg(struct rt_can_device *can, void *buf, rt_uint32_t boxno);
static void nu_can_isr(int vector, void *param);
static struct nu_can nu_can_arr[] =
{
#if defined(BSP_USING_CAN0)
{
.name = "can0",
.base = CAN0,
.irqn = IRQ_CAN0,
.rstidx = CAN0RST,
.clkidx = CAN0CKEN,
},
#endif
#if defined(BSP_USING_CAN1)
{
.name = "can1",
.base = CAN1,
.irqn = IRQ_CAN1,
.rstidx = CAN1RST,
.clkidx = CAN1CKEN,
},
#endif
}; /* struct nu_can */
/* Public functions ------------------------------------------------------------*/
/* Private variables ------------------------------------------------------------*/
static const struct rt_can_ops nu_can_ops =
{
.configure = nu_can_configure,
.control = nu_can_control,
.sendmsg = nu_can_sendmsg,
.recvmsg = nu_can_recvmsg,
};
static const struct can_configure nu_can_default_config = NU_CAN_CONFIG_DEFAULT;
/* Interrupt Handle Function ----------------------------------------------------*/
static void nu_can_isr(int vector, void *param)
{
nu_can_t psNuCAN = (nu_can_t)param;
/* Get base address of CAN register */
CAN_T *base = psNuCAN->base;
/* Get interrupt event */
uint32_t u32IIDRstatus = CAN_GET_INT_PENDING_STATUS(base) & CAN_IIDR_INTID_Msk;
/* Check Status Interrupt Flag (Error status Int and Status change Int) */
if (u32IIDRstatus == 0x00008000)
{
/**************************/
/* Status Change interrupt*/
/**************************/
if (base->STATUS & CAN_STATUS_TXOK_Msk)
{
base->STATUS &= ~CAN_STATUS_TXOK_Msk; /* Clear Tx Ok status*/
#ifndef RT_CAN_USING_HDR
if (psNuCAN->int_flag & RT_DEVICE_FLAG_INT_TX)
{
/*Using as Lisen,Loopback,Loopback+Lisen mode*/
rt_hw_can_isr(&psNuCAN->dev, RT_CAN_EVENT_TX_DONE);
}
#endif
}
if (base->STATUS & CAN_STATUS_RXOK_Msk)
{
base->STATUS &= ~CAN_STATUS_RXOK_Msk; /* Clear Rx Ok status*/
#ifndef RT_CAN_USING_HDR
if (psNuCAN->int_flag & RT_DEVICE_FLAG_INT_RX)
{
/*Using as Lisen,Loopback,Loopback+Lisen mode*/
rt_hw_can_isr(&psNuCAN->dev, RT_CAN_EVENT_RX_IND);
}
#endif
}
/**************************/
/* Error Status interrupt */
/**************************/
if (base->STATUS & CAN_STATUS_EWARN_Msk)
{
rt_kprintf("[%s]EWARN INT\n", psNuCAN->name) ;
}
if (base->STATUS & CAN_STATUS_BOFF_Msk)
{
rt_kprintf("[%s]BUSOFF INT\n", psNuCAN->name) ;
/* To release busoff pin */
CAN_EnterInitMode(base, CAN_CON_INIT_Msk | CAN_CON_CCE_Msk);
CAN_LeaveInitMode(base);
}
if (base->STATUS & CAN_STATUS_LEC_Msk)
{
rt_kprintf("[%s] Last Error Code %03x\n", psNuCAN->name, base->STATUS & CAN_STATUS_LEC_Msk) ;
}
}
#ifdef RT_CAN_USING_HDR
/*IntId: 0x0001-0x0020, Number of Message Object which caused the interrupt.*/
else if (u32IIDRstatus > 0 && u32IIDRstatus <= 32)
{
if ((psNuCAN->int_flag & RT_DEVICE_FLAG_INT_TX) &&
(u32IIDRstatus <= RX_MSG_ID_INDEX))
{
/*Message RAM 0~RX_MSG_ID_INDEX for CAN Tx using*/
rt_hw_can_isr(&psNuCAN->dev, RT_CAN_EVENT_TX_DONE);
}
else if (psNuCAN->int_flag & RT_DEVICE_FLAG_INT_RX)
{
/*Message RAM RX_MSG_ID_INDEX~31 for CAN Rx using*/
rt_hw_can_isr(&psNuCAN->dev, (RT_CAN_EVENT_RX_IND | ((u32IIDRstatus - 1) << 8)));
}
CAN_CLR_INT_PENDING_BIT(base, (u32IIDRstatus - 1)); /* Clear Interrupt Pending */
}
#endif
}
static void nu_can_ie(nu_can_t psNuCAN)
{
uint32_t u32CanIE = CAN_CON_IE_Msk;
if (psNuCAN->int_flag & (RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_INT_TX))
{
u32CanIE |= CAN_CON_SIE_Msk;
}
else
{
u32CanIE &= ~CAN_CON_SIE_Msk;
}
if (psNuCAN->int_flag & RT_DEVICE_CAN_INT_ERR)
{
u32CanIE |= CAN_CON_EIE_Msk;
}
else
{
u32CanIE &= ~CAN_CON_EIE_Msk;
}
if (u32CanIE & (CAN_CON_SIE_Msk | CAN_CON_EIE_Msk))
{
CAN_EnableInt(psNuCAN->base, u32CanIE);
/* Enable interrupt. */
rt_hw_interrupt_umask(psNuCAN->irqn);
}
else
{
u32CanIE |= (CAN_CON_IE_Msk | CAN_CON_SIE_Msk);
CAN_DisableInt(psNuCAN->base, u32CanIE);
/* Disable interrupt. */
rt_hw_interrupt_mask(psNuCAN->irqn);
}
}
static rt_err_t nu_can_configure(struct rt_can_device *can, struct can_configure *cfg)
{
nu_can_t psNuCAN = (nu_can_t)can;
uint32_t u32CANMode;
RT_ASSERT(can);
RT_ASSERT(cfg);
/* Get base address of CAN register */
CAN_T *base = psNuCAN->base;
/* Reset this module */
nu_sys_ip_reset(psNuCAN->rstidx);
u32CANMode = (cfg->mode == RT_CAN_MODE_NORMAL) ? CAN_NORMAL_MODE : CAN_BASIC_MODE;
/*Set the CAN Bit Rate and Operating mode*/
if (CAN_Open(base, cfg->baud_rate, u32CANMode) != cfg->baud_rate)
goto exit_nu_can_configure;
switch (cfg->mode)
{
case RT_CAN_MODE_NORMAL:
#ifdef RT_CAN_USING_HDR
CAN_LeaveTestMode(base);
#else
CAN_EnterTestMode(base, CAN_TEST_BASIC_Msk);
#endif
break;
case RT_CAN_MODE_LISTEN:
CAN_EnterTestMode(base, CAN_TEST_BASIC_Msk | CAN_TEST_SILENT_Msk);
break;
case RT_CAN_MODE_LOOPBACK:
CAN_EnterTestMode(base, CAN_TEST_BASIC_Msk | CAN_TEST_LBACK_Msk);
break;
case RT_CAN_MODE_LOOPBACKANLISTEN:
CAN_EnterTestMode(base, CAN_TEST_BASIC_Msk | CAN_TEST_SILENT_Msk | CAN_TEST_LBACK_Msk);
break;
default:
rt_kprintf("Unsupported Operating mode");
goto exit_nu_can_configure;
}
nu_can_ie(psNuCAN);
return RT_EOK;
exit_nu_can_configure:
CAN_Close(base);
return -(RT_ERROR);
}
static rt_err_t nu_can_control(struct rt_can_device *can, int cmd, void *arg)
{
rt_uint32_t argval = (rt_uint32_t)arg;
nu_can_t psNuCAN = (nu_can_t)can;
RT_ASSERT(can);
switch (cmd)
{
case RT_DEVICE_CTRL_SET_INT:
psNuCAN->int_flag |= argval;
nu_can_ie(psNuCAN);
break;
case RT_DEVICE_CTRL_CLR_INT:
psNuCAN->int_flag &= ~argval;
nu_can_ie(psNuCAN);
break;
case RT_CAN_CMD_SET_FILTER:
{
struct rt_can_filter_config *filter_cfg = (struct rt_can_filter_config *)arg;
for (int i = 0; i < filter_cfg->count; i++)
{
/*set the filter message object*/
if (filter_cfg->items[i].mode == 1)
{
if (CAN_SetRxMsgObjAndMsk(psNuCAN->base, MSG(filter_cfg->items[i].hdr_bank + RX_MSG_ID_INDEX), filter_cfg->items[i].ide, filter_cfg->items[i].id, filter_cfg->items[i].mask, FALSE) == FALSE)
{
return -(RT_ERROR);
}
}
else
{
/*set the filter message object*/
if (CAN_SetRxMsgAndMsk(psNuCAN->base, MSG(filter_cfg->items[i].hdr_bank + RX_MSG_ID_INDEX), filter_cfg->items[i].ide, filter_cfg->items[i].id, filter_cfg->items[i].mask) == FALSE)
{
return -(RT_ERROR);
}
}
}
}
break;
case RT_CAN_CMD_SET_MODE:
if ((argval == RT_CAN_MODE_NORMAL) ||
(argval == RT_CAN_MODE_LISTEN) ||
(argval == RT_CAN_MODE_LOOPBACK) ||
(argval == RT_CAN_MODE_LOOPBACKANLISTEN))
{
if (argval != can->config.mode)
{
can->config.mode = argval;
return nu_can_configure(can, &can->config);
}
}
else
{
return -(RT_ERROR);
}
break;
case RT_CAN_CMD_SET_BAUD:
{
if ((argval == CAN1MBaud) ||
(argval == CAN800kBaud) ||
(argval == CAN500kBaud) ||
(argval == CAN250kBaud) ||
(argval == CAN125kBaud) ||
(argval == CAN100kBaud) ||
(argval == CAN50kBaud) ||
(argval == CAN20kBaud) ||
(argval == CAN10kBaud))
{
if (argval != can->config.baud_rate)
{
can->config.baud_rate = argval;
return nu_can_configure(can, &can->config);
}
}
else
{
return -(RT_ERROR);
}
}
break;
case RT_CAN_CMD_SET_PRIV:
if (argval != RT_CAN_MODE_PRIV &&
argval != RT_CAN_MODE_NOPRIV)
{
return -(RT_ERROR);
}
if (argval != can->config.privmode)
{
can->config.privmode = argval;
return nu_can_configure(can, &can->config);
}
break;
case RT_CAN_CMD_GET_STATUS:
{
rt_uint32_t errtype = psNuCAN->base->ERR;
RT_ASSERT(arg);
/*Receive Error Counter, return value is with Receive Error Passive.*/
can->status.rcverrcnt = (errtype >> 8);
/*Transmit Error Counter*/
can->status.snderrcnt = (errtype & 0xFF);
/*Last Error Type*/
can->status.lasterrtype = CAN_GET_INT_STATUS(psNuCAN->base) & 0x8000;
/*Status error code*/
can->status.errcode = CAN_GET_INT_STATUS(psNuCAN->base) & 0x07;
rt_memcpy(arg, &can->status, sizeof(struct rt_can_status));
}
break;
default:
return -(RT_EINVAL);
}
return RT_EOK;
}
static int nu_can_sendmsg(struct rt_can_device *can, const void *buf, rt_uint32_t boxno)
{
STR_CANMSG_T tMsg;
struct rt_can_msg *pmsg;
nu_can_t psNuCAN = (nu_can_t)can;
RT_ASSERT(can);
RT_ASSERT(buf);
pmsg = (struct rt_can_msg *) buf;
if (pmsg->ide == RT_CAN_STDID && IS_CAN_STDID(pmsg->id))
{
/* Standard ID (11 bits)*/
tMsg.IdType = CAN_STD_ID;
tMsg.Id = pmsg->id ;
}
else if (pmsg->ide == RT_CAN_EXTID && IS_CAN_EXTID(pmsg->id))
{
/* Extended ID (29 bits)*/
tMsg.IdType = CAN_EXT_ID;
tMsg.Id = pmsg->id ;
}
else
{
goto exit_nu_can_sendmsg;
}
if (pmsg->rtr == RT_CAN_DTR)
{
/* Data frame */
tMsg.FrameType = CAN_DATA_FRAME;
}
else if (pmsg->rtr == RT_CAN_RTR)
{
/* Remote frame */
tMsg.FrameType = CAN_REMOTE_FRAME;
}
else
{
goto exit_nu_can_sendmsg;
}
/* Check the parameters */
if (IS_CAN_DLC(pmsg->len))
{
tMsg.DLC = pmsg->len;
}
else
{
goto exit_nu_can_sendmsg;
}
if (pmsg->data && pmsg->len)
{
rt_memcpy(&tMsg.Data[0], pmsg->data, pmsg->len);
}
else
{
goto exit_nu_can_sendmsg;
}
/* Configure Msg RAM and send the Msg in the RAM. */
if (CAN_Transmit(psNuCAN->base, MSG(boxno), &tMsg) == FALSE)
{
goto exit_nu_can_sendmsg;
}
return RT_EOK;
exit_nu_can_sendmsg:
return -(RT_ERROR);
}
static int nu_can_recvmsg(struct rt_can_device *can, void *buf, rt_uint32_t boxno)
{
STR_CANMSG_T tMsg;
struct rt_can_msg *pmsg;
nu_can_t psNuCAN = (nu_can_t)can;
RT_ASSERT(can);
RT_ASSERT(buf);
pmsg = (struct rt_can_msg *) buf;
/* get data */
if (CAN_Receive(psNuCAN->base, boxno, &tMsg) == FALSE)
{
rt_kprintf("No available RX Msg.\n");
return -(RT_ERROR);
}
#ifdef RT_CAN_USING_HDR
/* Hardware filter messages are valid */
pmsg->hdr_index = boxno - RX_MSG_ID_INDEX;
can->hdr[pmsg->hdr_index].connected = 1;
#endif
pmsg->ide = (tMsg.IdType == CAN_STD_ID) ? RT_CAN_STDID : RT_CAN_EXTID;
pmsg->rtr = (tMsg.FrameType == CAN_DATA_FRAME) ? RT_CAN_DTR : RT_CAN_RTR;
pmsg->id = tMsg.Id;
pmsg->len = tMsg.DLC ;
if (pmsg->data && pmsg->len)
rt_memcpy(pmsg->data, &tMsg.Data[0], pmsg->len);
return RT_EOK;
}
/**
* Hardware CAN Initialization
*/
static int rt_hw_can_init(void)
{
int i;
rt_err_t ret = RT_EOK;
for (i = (CAN_START + 1); i < CAN_CNT; i++)
{
nu_can_arr[i].dev.config = nu_can_default_config;
#ifdef RT_CAN_USING_HDR
nu_can_arr[i].dev.config.maxhdr = RT_CANMSG_BOX_SZ;
#endif
/* Register CAN ISR */
rt_hw_interrupt_install(nu_can_arr[i].irqn, nu_can_isr, &nu_can_arr[i], nu_can_arr[i].name);
/* Enable IP engine clock */
nu_sys_ipclk_enable(nu_can_arr[i].clkidx);
/* Register can device */
ret = rt_hw_can_register(&nu_can_arr[i].dev, nu_can_arr[i].name, &nu_can_ops, NULL);
RT_ASSERT(ret == RT_EOK);
}
return (int)ret;
}
INIT_DEVICE_EXPORT(rt_hw_can_init);
#endif //#if defined(BSP_USING_CAN)
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